Electric hammer.



PATENTED MAR. 19, 1907.

W. A. DENNY.

ELECTRIC HAMMER.

APPLICATION FILED JULY 26, 1906.

2 $HEETS-SHBET l.

3 MW m0 m A a; 1 .4 m w W 5 PATENTED MAR. 19, 1907.

W. A. DENNY. ELEGTRIUHAMMER. APPLICATION TILED JULY 2a, 1906.

2 SHEETS-SHEET 2.

Y W M, 4 n

INVENTOR. W/hflk/d 06/7 WITNESSES.-

W B Y Madam-7Q rr v. in m WlNFlELD 1%.. DENNY, "(2 F TO BEN Alli 'N D. lilvlill lilllli OF ANDERSON, il

@FFTQE- .t'lpeciiticetion of Letters Fete-zit.

Patented March 19, 1907.

Application filed July 26, 1906. Serial llol 327,.3945.

To all whom 1 1 nutg con/cc;

Be it known that l, Wmrrnrc A. DENNY, of Anderson, county of Madison, d State oi Indiana, have in 'ented 21 certain new and useful Electric llemn'xor; and i do hereby declare that the iollowin is is full, clesr, and exact desc 'gtion thereof, reference beir g had to the accompanying rewings, in whi. like letters refer to like parts.

The object of this invention. to'ectuete s hammer, punch, or other tool by giving it longitudinal reciprocetory movement by the direct action. of solenoids, magnets, or like electrical means.

The result cough t "s the simple, smell, ellicirn' econoiiuicel device ior'iiipersting I enriches, end. the like in vericus situstio from the of electricitv.

on .2- ve ry Mic device may be relatively so smell that for many nuposcs it may be convenient i handled. or con ried by hand while using it. The device can be used f r riveting, seeming, chi h, celking, dining, punching, end the like. l. can be mounted so as to swing an anvil nude" o plunger or plate carrying dies for punching and as c hend-tool.

The chief feature of the invention. consists indirectly connecting a hammer, plunger, or the like with cores of solenoids mid the like, 'so that said hammer will be reciproceted at each energizetion of the solenoids.

Another feature of the invention consists in utilizing two sets of solenoids with two sets of cores that alternately operated by the current and with hennners associated so as to not upon o single plunger or he like, whereby great rapidity of enrol; obtained.

Another foetus. of the invention consists in providing; the solenoids with a sol t-iron base and connecting the softirn cores of the .solenoids at their outer ends, so that there will be a continuous magnetic circuit through them, and the action of the n'ntg'netic circuit upon the cores will increase in pow-er es the inner ends of the cores approach the soft-iron base and as the liommeris ready to give its blow. This merely increases the force of the blow and the ell'ectivencss of the device.

The full nature of the invention will be more fully understood from the eccomnehying drawings and the following descri ltion and claims.

' being fastened on the 23, respectively. cured to e yoke '24, Whl e the cores 22 are se Y in the drawings, Figure 1 is a side elevetion of the device. Fig. 2 is s central verticol section through the upper portion thereof, showing the position of the parts at actuation. Fig 3 on electrical diagram of'th'e wiring. ig. l a plan view of the solenoids end surrounltling casing. Fig. 5 is a perspective view of the cores of the solenoids. Fig. 6 is :1. central vertical section through the solenoids and easing with the cores in their unopereted position.

The form of device herein shown to illustrste the nature of my invention is as fol I lows: A table 10 is mounted on a. post 11,

suoported by legs 12 in proximity to a motor 12), and a storage battery I L A switch 15 is on the post 11 below the table, and shove the table on electrical hammer mechanism is mounted a casing 16, said casing post 11 by a. set-screw 1'? end having e lid 18.

Qoining now to the reel invention, 1 rovide within the casing 16 two pairs of so enoirls or coils 20 and 21, having cores 22 and The air of cores 23 is secured. to e yoke 25. These yokes are or ranged at right angles to each other, the yolre 25 having a central downwardly-extending loop 26 end the yoke 24 extending and operating loosely through said loop. The loop 26 extends down far enough to permit the free and independent movement of both pairs of cores. Each core is returned and normally held in its upward position by springs 27 that are coiled around the upper ends of the core end bear against the yoke shove, end a bracket 28, secured to the inner surface of the casing 16.

A plunger 30 ismounted within a base 29 oi" the casing and .is verticnl and reciprocates longitudinally of its length, it being forced downward alternately by a hammer 31 from the yoke 24 and a hammer 131 from the yoke The hammer 131 is integral with the loop 26. The hammer 31 passes loosely through a central aperture in the lower part of me loop 26 and the hammer 131.- As each pair of solenoids is energized the lunger is given a blow on its head by the ammers. To the lowe end of the plunger any suitable tool, such as may he secured by e set-screw 33. In Fi 2 the tool i's'fshown wheels 45 am J 'current from the ii lenoids and two lHLlHHHI'm, it is (ilivimm as Welding pieces are on the table 1 WilG 4.1. The 011:" cells 01' solenoids t ted b Si wire Meal; switch :mtir llfll-linoior. The z'y brush &4, i

Lilin breaks the {HLZ'LTCIIL stops the o1,

known form of iiiiuuit and-breal sw tb that shown me By the length 4 Ward nmvemiaiit close to the iwii imma i Ming nwveine.

top by? yoke, and bilfi base 29 are fill formed ()5 continuous magnetic: said soft-iron base cores, magnetic power of said. as this cores appr'imh ill limit of mcwement m" i blow of (he hirnn is 

